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Internet services provider sampled 537 customers, and finds that 142 of them experienced an interruption in high speed service during the pervious month. What is the upper bound for the 99% confidence interval for the proportion of customers who experienced an interruption?
a paired-samples test is reported as t18 1.73. make a decision about this test assuming a two-tailed hypothesis test
What is the probability of randomly choosing a red jelly bean from a jar containing 20 red, 23 green, and 7 black jelly beans
Construct a 99% confidence interval for the proportion of middle-income Americans who actively participate in the stock market. (Round intermediate calculations to 4 decimal places, "z" value to 2 decimal places, and final answers to 3 decimal pla..
the yearly tuition costs x in hundreds of dollars for six state universities are given in the table below. for each
when dragons on planet pern lay eggs the eggs are either green or yellow. the biologists have observed over the years
The adjusted R 2 was 53%.19 Carefully analyze these results and try to draw a conclu- sion about the effects of the 1985 French Banking Deregulation Act.
tire pressure in a certain car is a normally distributed random variable with mean 30 psi pounds per square inch and
jinbao produces tubas and ships them in lots of twenty. suppose that 60 of all such lots contain no defective tubas 30
Suppose a random sample of 20 tax returns from small business is examined. What is the binomial probability that at least one tax return involves fraud?
It is estimated that 55% of the freshmen entering a particular college will graduate from that college in four years. a. For a random sample of 5 entering freshmen, what is the probability that exactly 3 will graduate in four years?
Draw and find the area under the standard normal curve - Find the indicated z-score and Which normal curve has the greatest mean and standard deviation? And which normal curve has the smallest mean and standard deviation?
How many Corolla buyers must be surveyed if we want to be 95% confident that the sample percentage is within four percentage points of the true percent all Corolla buyers?
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